Gas-engine



W. E'. DEISCH.

` GA-s ENGINE.

APPLICATIONFILED JULY 3,1919.

Patented May 3, 1921.

WILLIAM E. DEIVSCH, OF PORTLAND, OREGON.

GAS-ENGINE.

Specification of Letters Patent.

lPatented May 3, 1921.

' Application sied July 3, 1919. serial No. 308,377.

To all whom-t may concern:

Beit known that I, WILLIAM E. DEisoH, a citizen of the United States,residing at Portland, inthe county of Multnomah and State of Oregon,have invented n ew and useful Improvements in Gas-Engines, of which thefollowing is a specication.

This invention relates to gas engines, particularly to those of themulti-cylinder tw o cycletype, and has for its object the `provision ofan improved engine in which each cylinder is formed in sections of,different diameters and in which each cylinder has working therein adifferential piston having one section operating in one section'of thecylinder constituting the explosion chamber and another sectionoperating in the .other section of the cylinder and constituting acharge forming device for compressing a charge' and delivering it to theexplosion seotion of the next adjacent cylinder, air automaticallyopened and closed passage. being provided for establishing communicationbetween adjacentcylinders, action in the adjacent cylinders being mutualor reciprocal.

An important object is the provision o f an engine of this characterwhich is provided a novel port and passage arrangement for effecting thetransfer of a charge from the compressing and charge forming section ofone cylinder to the explosion section of the next adjacent cylinder, theinvention being adaptable for use in connection with any two cycle motorhaving an even number of cylinders set side by side in parallel'relationor arranged as in a V-type motor or also arranged in opposed relation,andthe structure may also be employed on engines using any of the wellknown types -of fuel. An additional object is the provision of an engineof this character which lwill be comparatively simple in constructionand operation, which will be efficient and durable in use, and a generalimprovement in the art.

With the above andtother objects and advantages in view, the inventionconsists in the details of construction to `be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawing, inwhich V Figure 1 isa longitudinal sectional view of an engineconstructed in accordance with m invention, and c lig. 2 is a lonitudinal sectional viewv on the line 2-2 of ig. 1. Y

ing, I have shown an engine Referring more particularly to thedrawcomprising cylinders designated broadly byl the numerals 10 and 11arranged side by side in parallel relation, the engine being of the twocycle type. The cylinder 10 comprisessections 12 and 13 of differentdiameters,l the former being the smaller and constituting the explos1onsection or chamber and the latter constituting a compressing or charge'formand not being essential to a clear understanding thereof. Thecylinder 10 is also provided with a packing ring 19 at the lower endofthe section 12 and this packing ring firmly engages the section 14 ofthe piston for making a fluid-tight joint. The cylinders arealsoprovided at their upper ends with the usual spark plug openings 20.

The cylinder 11 is identical in construction with the cylinder 10 andcomprises the sections 21 and 22w1'thin which are movable the sections23 and 24 of the piston provided -with the usual connecting rod 18.

.Formed in the `cylinders l0 and 11 are intake ports 25 and 26,respectively, and exhaust ports 27 and 28,respecti'vely, and

-these various ports are connected with the proper` manifolds, as shown,in the ordinary manner.d Formed in the walls of the sections 14 and 23of the pistons are passages 29 and 30, respectively, which at certaintimes are adapted to register with the intake ports 25 and 26,respectively. Formed in the walls of the piston sections 15 and 24, arepassages 31 and.32, respectively, which are at certain times adapted toregister with openings or ports 33 and 34 formed in 'the sections 12 and21'ofthe cylinders, Arespectively. The ports 33 and 34 communicate witha 4passage 35 lformed in a member 36 disposed between the cylinders 10and 1-1.

When either of the passages 31 or 32 is in registration or communicationwith the opening 33 or 34 as' the case may be, communication will` beestablished between the cylinder section 13 and cylinder section 21 orbetween the cylinder section 12 and cylinder section 24, the formermentioned position being shown in Fig. 1. i

The operation of the engine is as follows Referring to the, drawing itwill be seen ithat the piston in the cylinder 10 is at the top of itsstroke and that the piston in c linder11 is at `the-bottom of itsstroke.

hen the piston in cylinder 10 starts on its down stroke a partial vacuumwill be caused in the cylinder section 13 until the piston approachesthe bottom of its stroke, whereupon the port 29 in the piston section14;'

. will register with the intake port 25, where-v the piston starts onits upstroke, the ports and 27 will be covered and the mixture withinthe cylinder section 13 will be compressed until the upper end of thepassage 31 registers with the opening33 in the cylinder wall 'whereuponthis compressed mix- 15 port 2G at the lower limit of the stroke, freshture will pass through the passage 35 in the member 36 and through theopening 34 into the cylinder section 21 .of the cylinder 11. The pistonin the cylinder 10 upon reaching the top of its upstrokeisready torepeat its cycle of opera-tions. Nhen the Vpiston in cylinder 10 reachesvthe top of its stroke the piston in cylinder'll is at the bottom of itsstroke and the charge whichwas previously compressed within the cylindersection 13 is then in the cylinder section 21. As the piston in cylinder11v then moves upwardly the mixture within the section .21 will then becompressed. As the piston in `cylindervll subsequently starts on itsdown stroke and the port 30 registers with the mixture will bc suppliedto the cylinder section 22 in exactly the same manner as it was suppliedto the cylinder section 13 and 'the operation of the piston in cylinder11 is identically the same as that of the piston in cylinder 10. It willbe noted that thepistons and ports as well as the other parts, are soarranged that the action in each cylinder will bey reciprocal to that inthe other cylinder. Another feature of the invention is that the topwalls of the piston sections 14 and 23 are so formed that when apartially compressed charge is forced from either cylinder into theother, `the charge will, upon encountering the curved top'wall of thepiston, b e deflected upwardly in the proper direction. j

. From the foregoing description and a study of the drawings it will beapparen that I have thus provided a simply constructed engine of the twocycle type which is adapted'to have its cylinders arranged,

in various wgaysand which is provided with novel means whereby eachcylinder partially compressesa charge and forces it into the explosionchamber of the next adjacent cylinder, the arrangement being such thatthe cylinders are reciprocal.

While I have shown and described 'the preferred embodiment of myinvention, it is of course to b e understood that I reserve the righttomake such changes in the form,

each cylinder formed in sections conform ing to said cylinder sectionsand slidable therein, each cylinder being provided in the smallersection thereof with an eXhaust'port and being further providedintermediate the ends ofthe smaller section with an inlet port, `thesmal-ler section 'of each cylinder having further formed therein a portopposite the exhaust port, a passage member c0nnecting said cylindersand establishing communication between said last named ports, the upperportion of the smaller section of each piston having formed in one sidethereof a longitudinally elongated depressed portionforming a passageadapted to register with the inlet port and to establish coin-I'nunication therebetween and the. larger section of the cylinder, saidinlet port being arranged approximately at right angles to the exhaustport and said last named port, and the lower portion of the smallersection of each piston having formed in one side thereof a Adepressedportion forming a passageI adapted to ,establish communication betweenthe larger section of the cylinder and the smaller section of the othercylinder throughsaid last named ports and said passage mcmber.

WILLIAM E. DEISCH.

